#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int a=0, b=0;
	scanf("%d %d", &a, &b);
	int tem = a ^ b;
	int count=0;
	for (int i = 0; i < 32; i++)
	{
		if (((tem >> i) & 1) == 1)
			count++;
	}
	printf("%d", count);
}






















